Add component tests

tests/components/get_link_modal.test.jsx

@@ -0,0 +1,58 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import React from 'react';
+
+import {shallow} from 'enzyme';
+import {Modal} from 'react-bootstrap';
+
+import GetLinkModal from 'components/get_link_modal.jsx';
+
+describe('components/GetLinkModal', () => {
+    test('should match snapshot when all props is set', () => {
+        function emptyFunction() {} //eslint-disable-line no-empty-function
+
+        const wrapper = shallow(
+            <GetLinkModal
+                show={true}
+                onHide={emptyFunction}
+                title={'title'}
+                helpText={'help text'}
+                link={'https://mattermost.com'}
+            />
+        );
+
+        expect(wrapper).toMatchSnapshot();
+    });
+
+    test('should match snapshot when helpText is not set', () => {
+        function emptyFunction() {} //eslint-disable-line no-empty-function
+
+        const wrapper = shallow(
+            <GetLinkModal
+                show={true}
+                onHide={emptyFunction}
+                title={'title'}
+                link={'https://mattermost.com'}
+            />
+        );
+
+        expect(wrapper).toMatchSnapshot();
+    });
+
+    test('should have called onHide', () => {
+        const onHide = jest.fn();
+
+        const wrapper = shallow(
+            <GetLinkModal
+                show={true}
+                onHide={onHide}
+                title={'title'}
+                link={'https://mattermost.com'}
+            />
+        );
+
+        wrapper.find(Modal).first().props().onHide();
+        expect(onHide).toHaveBeenCalledTimes(1);
+    });
+});

tests/setup.js

@@ -5,3 +5,18 @@ import Adapter from 'enzyme-adapter-react-15';
 import {configure} from 'enzyme';
 
 configure({adapter: new Adapter()});
+
+var documentMock = (function() {
+    const supportedCommands = ['copy'];
+
+    return {
+        queryCommandSupported(cmd) {
+            return supportedCommands.includes(cmd);
+        },
+        execCommand(cmd) {
+            return supportedCommands.includes(cmd);
+        }
+    };
+}());
+
+Object.defineProperty(window, 'document', {value: documentMock});